Investigators were still trying to piece together what happened, but Tiano said the victims were riding in a Lexus and had pulled over to the side of the road when a man approached and began shooting.

The incident was initially reported as a car-to-car shooting. Tiano said that although investigators had not ruled out that scenario, they believe the suspect got in a car after the shooting and sped away.

The victims -- described as two young men and two young women -- were taken to area hospitals, where one of the men later died, Tiano said. No other information about the victims or their conditions were available.

A nearby house was also struck by gunfire, homeowner Bilai Wellthy told KTLA. No other injuries were reported.

"I was watching the TV and I was talking on the phone and I heard the
gunshots -- bang, bang, bang, bang, bang," Wellthy told the television station. "Five shots."

Detectives were looking into whether the incident was gang-related, Tiano said.